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Merge remote-tracking branch 'spi/topic/build' into spi-next
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / sta.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63 #include <net/mac80211.h>
64
65 #include "mvm.h"
66 #include "sta.h"
67 #include "rs.h"
68
69 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm)
70 {
71 int sta_id;
72
73 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
74
75 lockdep_assert_held(&mvm->mutex);
76
77 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
78 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++)
79 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
80 lockdep_is_held(&mvm->mutex)))
81 return sta_id;
82 return IWL_MVM_STATION_COUNT;
83 }
84
85 /* send station add/update command to firmware */
86 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
87 bool update)
88 {
89 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
90 struct iwl_mvm_add_sta_cmd add_sta_cmd;
91 int ret;
92 u32 status;
93 u32 agg_size = 0, mpdu_dens = 0;
94
95 memset(&add_sta_cmd, 0, sizeof(add_sta_cmd));
96
97 add_sta_cmd.sta_id = mvm_sta->sta_id;
98 add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
99 if (!update) {
100 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
101 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
102 }
103 add_sta_cmd.add_modify = update ? 1 : 0;
104
105 add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK |
106 STA_FLG_MIMO_EN_MSK);
107
108 switch (sta->bandwidth) {
109 case IEEE80211_STA_RX_BW_160:
110 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
111 /* fall through */
112 case IEEE80211_STA_RX_BW_80:
113 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
114 /* fall through */
115 case IEEE80211_STA_RX_BW_40:
116 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
117 /* fall through */
118 case IEEE80211_STA_RX_BW_20:
119 if (sta->ht_cap.ht_supported)
120 add_sta_cmd.station_flags |=
121 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
122 break;
123 }
124
125 switch (sta->rx_nss) {
126 case 1:
127 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
128 break;
129 case 2:
130 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
131 break;
132 case 3 ... 8:
133 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
134 break;
135 }
136
137 switch (sta->smps_mode) {
138 case IEEE80211_SMPS_AUTOMATIC:
139 case IEEE80211_SMPS_NUM_MODES:
140 WARN_ON(1);
141 break;
142 case IEEE80211_SMPS_STATIC:
143 /* override NSS */
144 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
146 break;
147 case IEEE80211_SMPS_DYNAMIC:
148 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
149 break;
150 case IEEE80211_SMPS_OFF:
151 /* nothing */
152 break;
153 }
154
155 if (sta->ht_cap.ht_supported) {
156 add_sta_cmd.station_flags_msk |=
157 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
158 STA_FLG_AGG_MPDU_DENS_MSK);
159
160 mpdu_dens = sta->ht_cap.ampdu_density;
161 }
162
163 if (sta->vht_cap.vht_supported) {
164 agg_size = sta->vht_cap.cap &
165 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
166 agg_size >>=
167 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
168 } else if (sta->ht_cap.ht_supported) {
169 agg_size = sta->ht_cap.ampdu_factor;
170 }
171
172 add_sta_cmd.station_flags |=
173 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
174 add_sta_cmd.station_flags |=
175 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
176
177 status = ADD_STA_SUCCESS;
178 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
179 &add_sta_cmd, &status);
180 if (ret)
181 return ret;
182
183 switch (status) {
184 case ADD_STA_SUCCESS:
185 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
186 break;
187 default:
188 ret = -EIO;
189 IWL_ERR(mvm, "ADD_STA failed\n");
190 break;
191 }
192
193 return ret;
194 }
195
196 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
197 struct ieee80211_vif *vif,
198 struct ieee80211_sta *sta)
199 {
200 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
201 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
202 int i, ret, sta_id;
203
204 lockdep_assert_held(&mvm->mutex);
205
206 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
207 sta_id = iwl_mvm_find_free_sta_id(mvm);
208 else
209 sta_id = mvm_sta->sta_id;
210
211 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
212 return -ENOSPC;
213
214 spin_lock_init(&mvm_sta->lock);
215
216 mvm_sta->sta_id = sta_id;
217 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
218 mvmvif->color);
219 mvm_sta->vif = vif;
220 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
221 mvm_sta->tx_protection = 0;
222 mvm_sta->tt_tx_protection = false;
223
224 /* HW restart, don't assume the memory has been zeroed */
225 atomic_set(&mvm->pending_frames[sta_id], 0);
226 mvm_sta->tid_disable_agg = 0;
227 mvm_sta->tfd_queue_msk = 0;
228 for (i = 0; i < IEEE80211_NUM_ACS; i++)
229 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
230 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
231
232 /* for HW restart - need to reset the seq_number etc... */
233 memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data));
234
235 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
236 if (ret)
237 return ret;
238
239 /* The first station added is the AP, the others are TDLS STAs */
240 if (vif->type == NL80211_IFTYPE_STATION &&
241 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
242 mvmvif->ap_sta_id = sta_id;
243
244 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
245
246 return 0;
247 }
248
249 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
250 struct ieee80211_vif *vif,
251 struct ieee80211_sta *sta)
252 {
253 return iwl_mvm_sta_send_to_fw(mvm, sta, true);
254 }
255
256 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
257 bool drain)
258 {
259 struct iwl_mvm_add_sta_cmd cmd = {};
260 int ret;
261 u32 status;
262
263 lockdep_assert_held(&mvm->mutex);
264
265 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
266 cmd.sta_id = mvmsta->sta_id;
267 cmd.add_modify = STA_MODE_MODIFY;
268 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
269 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
270
271 status = ADD_STA_SUCCESS;
272 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
273 &cmd, &status);
274 if (ret)
275 return ret;
276
277 switch (status) {
278 case ADD_STA_SUCCESS:
279 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
280 mvmsta->sta_id);
281 break;
282 default:
283 ret = -EIO;
284 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
285 mvmsta->sta_id);
286 break;
287 }
288
289 return ret;
290 }
291
292 /*
293 * Remove a station from the FW table. Before sending the command to remove
294 * the station validate that the station is indeed known to the driver (sanity
295 * only).
296 */
297 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
298 {
299 struct ieee80211_sta *sta;
300 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
301 .sta_id = sta_id,
302 };
303 int ret;
304
305 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
306 lockdep_is_held(&mvm->mutex));
307
308 /* Note: internal stations are marked as error values */
309 if (!sta) {
310 IWL_ERR(mvm, "Invalid station id\n");
311 return -EINVAL;
312 }
313
314 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, CMD_SYNC,
315 sizeof(rm_sta_cmd), &rm_sta_cmd);
316 if (ret) {
317 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
318 return ret;
319 }
320
321 return 0;
322 }
323
324 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
325 {
326 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
327 u8 sta_id;
328
329 /*
330 * The mutex is needed because of the SYNC cmd, but not only: if the
331 * work would run concurrently with iwl_mvm_rm_sta, it would run before
332 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
333 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
334 * that later.
335 */
336 mutex_lock(&mvm->mutex);
337
338 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
339 int ret;
340 struct ieee80211_sta *sta =
341 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
342 lockdep_is_held(&mvm->mutex));
343
344 /* This station is in use */
345 if (!IS_ERR(sta))
346 continue;
347
348 if (PTR_ERR(sta) == -EINVAL) {
349 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
350 sta_id);
351 continue;
352 }
353
354 if (!sta) {
355 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
356 sta_id);
357 continue;
358 }
359
360 WARN_ON(PTR_ERR(sta) != -EBUSY);
361 /* This station was removed and we waited until it got drained,
362 * we can now proceed and remove it.
363 */
364 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
365 if (ret) {
366 IWL_ERR(mvm,
367 "Couldn't remove sta %d after it was drained\n",
368 sta_id);
369 continue;
370 }
371 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
372 clear_bit(sta_id, mvm->sta_drained);
373 }
374
375 mutex_unlock(&mvm->mutex);
376 }
377
378 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
379 struct ieee80211_vif *vif,
380 struct ieee80211_sta *sta)
381 {
382 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
383 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
384 int ret;
385
386 lockdep_assert_held(&mvm->mutex);
387
388 if (vif->type == NL80211_IFTYPE_STATION &&
389 mvmvif->ap_sta_id == mvm_sta->sta_id) {
390 /* flush its queues here since we are freeing mvm_sta */
391 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
392
393 /*
394 * Put a non-NULL since the fw station isn't removed.
395 * It will be removed after the MAC will be set as
396 * unassoc.
397 */
398 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
399 ERR_PTR(-EINVAL));
400
401 /* if we are associated - we can't remove the AP STA now */
402 if (vif->bss_conf.assoc)
403 return ret;
404
405 /* unassoc - go ahead - remove the AP STA now */
406 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
407 }
408
409 /*
410 * Make sure that the tx response code sees the station as -EBUSY and
411 * calls the drain worker.
412 */
413 spin_lock_bh(&mvm_sta->lock);
414 /*
415 * There are frames pending on the AC queues for this station.
416 * We need to wait until all the frames are drained...
417 */
418 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
419 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
420 ERR_PTR(-EBUSY));
421 spin_unlock_bh(&mvm_sta->lock);
422 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
423 } else {
424 spin_unlock_bh(&mvm_sta->lock);
425 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
426 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
427 }
428
429 return ret;
430 }
431
432 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
433 struct ieee80211_vif *vif,
434 u8 sta_id)
435 {
436 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
437
438 lockdep_assert_held(&mvm->mutex);
439
440 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL);
441 return ret;
442 }
443
444 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta,
445 u32 qmask)
446 {
447 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
448 sta->sta_id = iwl_mvm_find_free_sta_id(mvm);
449 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
450 return -ENOSPC;
451 }
452
453 sta->tfd_queue_msk = qmask;
454
455 /* put a non-NULL value so iterating over the stations won't stop */
456 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
457 return 0;
458 }
459
460 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
461 {
462 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
463 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
464 sta->sta_id = IWL_MVM_STATION_COUNT;
465 }
466
467 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
468 struct iwl_mvm_int_sta *sta,
469 const u8 *addr,
470 u16 mac_id, u16 color)
471 {
472 struct iwl_mvm_add_sta_cmd cmd;
473 int ret;
474 u32 status;
475
476 lockdep_assert_held(&mvm->mutex);
477
478 memset(&cmd, 0, sizeof(struct iwl_mvm_add_sta_cmd));
479 cmd.sta_id = sta->sta_id;
480 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
481 color));
482
483 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
484
485 if (addr)
486 memcpy(cmd.addr, addr, ETH_ALEN);
487
488 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
489 &cmd, &status);
490 if (ret)
491 return ret;
492
493 switch (status) {
494 case ADD_STA_SUCCESS:
495 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
496 return 0;
497 default:
498 ret = -EIO;
499 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
500 status);
501 break;
502 }
503 return ret;
504 }
505
506 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
507 {
508 int ret;
509
510 lockdep_assert_held(&mvm->mutex);
511
512 /* Add the aux station, but without any queues */
513 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0);
514 if (ret)
515 return ret;
516
517 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
518 MAC_INDEX_AUX, 0);
519
520 if (ret)
521 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
522 return ret;
523 }
524
525 /*
526 * Send the add station command for the vif's broadcast station.
527 * Assumes that the station was already allocated.
528 *
529 * @mvm: the mvm component
530 * @vif: the interface to which the broadcast station is added
531 * @bsta: the broadcast station to add.
532 */
533 int iwl_mvm_send_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
534 struct iwl_mvm_int_sta *bsta)
535 {
536 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
537 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
538
539 lockdep_assert_held(&mvm->mutex);
540
541 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
542 return -ENOSPC;
543
544 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
545 mvmvif->id, mvmvif->color);
546 }
547
548 /* Send the FW a request to remove the station from it's internal data
549 * structures, but DO NOT remove the entry from the local data structures. */
550 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm,
551 struct iwl_mvm_int_sta *bsta)
552 {
553 int ret;
554
555 lockdep_assert_held(&mvm->mutex);
556
557 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
558 if (ret)
559 IWL_WARN(mvm, "Failed sending remove station\n");
560 return ret;
561 }
562
563 /* Allocate a new station entry for the broadcast station to the given vif,
564 * and send it to the FW.
565 * Note that each P2P mac should have its own broadcast station.
566 *
567 * @mvm: the mvm component
568 * @vif: the interface to which the broadcast station is added
569 * @bsta: the broadcast station to add. */
570 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
571 struct iwl_mvm_int_sta *bsta)
572 {
573 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
574 static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
575 u32 qmask;
576 int ret;
577
578 lockdep_assert_held(&mvm->mutex);
579
580 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
581 ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask);
582 if (ret)
583 return ret;
584
585 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
586 mvmvif->id, mvmvif->color);
587
588 if (ret)
589 iwl_mvm_dealloc_int_sta(mvm, bsta);
590 return ret;
591 }
592
593 /*
594 * Send the FW a request to remove the station from it's internal data
595 * structures, and in addition remove it from the local data structure.
596 */
597 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *bsta)
598 {
599 int ret;
600
601 lockdep_assert_held(&mvm->mutex);
602
603 ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
604 if (ret)
605 return ret;
606
607 iwl_mvm_dealloc_int_sta(mvm, bsta);
608 return ret;
609 }
610
611 #define IWL_MAX_RX_BA_SESSIONS 16
612
613 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
614 int tid, u16 ssn, bool start)
615 {
616 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
617 struct iwl_mvm_add_sta_cmd cmd = {};
618 int ret;
619 u32 status;
620
621 lockdep_assert_held(&mvm->mutex);
622
623 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
624 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
625 return -ENOSPC;
626 }
627
628 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
629 cmd.sta_id = mvm_sta->sta_id;
630 cmd.add_modify = STA_MODE_MODIFY;
631 if (start) {
632 cmd.add_immediate_ba_tid = (u8) tid;
633 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
634 } else {
635 cmd.remove_immediate_ba_tid = (u8) tid;
636 }
637 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
638 STA_MODIFY_REMOVE_BA_TID;
639
640 status = ADD_STA_SUCCESS;
641 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
642 &cmd, &status);
643 if (ret)
644 return ret;
645
646 switch (status) {
647 case ADD_STA_SUCCESS:
648 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
649 start ? "start" : "stopp");
650 break;
651 case ADD_STA_IMMEDIATE_BA_FAILURE:
652 IWL_WARN(mvm, "RX BA Session refused by fw\n");
653 ret = -ENOSPC;
654 break;
655 default:
656 ret = -EIO;
657 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
658 start ? "start" : "stopp", status);
659 break;
660 }
661
662 if (!ret) {
663 if (start)
664 mvm->rx_ba_sessions++;
665 else if (mvm->rx_ba_sessions > 0)
666 /* check that restart flow didn't zero the counter */
667 mvm->rx_ba_sessions--;
668 }
669
670 return ret;
671 }
672
673 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
674 int tid, u8 queue, bool start)
675 {
676 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
677 struct iwl_mvm_add_sta_cmd cmd = {};
678 int ret;
679 u32 status;
680
681 lockdep_assert_held(&mvm->mutex);
682
683 if (start) {
684 mvm_sta->tfd_queue_msk |= BIT(queue);
685 mvm_sta->tid_disable_agg &= ~BIT(tid);
686 } else {
687 mvm_sta->tfd_queue_msk &= ~BIT(queue);
688 mvm_sta->tid_disable_agg |= BIT(tid);
689 }
690
691 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
692 cmd.sta_id = mvm_sta->sta_id;
693 cmd.add_modify = STA_MODE_MODIFY;
694 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
695 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
696 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
697
698 status = ADD_STA_SUCCESS;
699 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
700 &cmd, &status);
701 if (ret)
702 return ret;
703
704 switch (status) {
705 case ADD_STA_SUCCESS:
706 break;
707 default:
708 ret = -EIO;
709 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
710 start ? "start" : "stopp", status);
711 break;
712 }
713
714 return ret;
715 }
716
717 static const u8 tid_to_ac[] = {
718 IEEE80211_AC_BE,
719 IEEE80211_AC_BK,
720 IEEE80211_AC_BK,
721 IEEE80211_AC_BE,
722 IEEE80211_AC_VI,
723 IEEE80211_AC_VI,
724 IEEE80211_AC_VO,
725 IEEE80211_AC_VO,
726 };
727
728 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
729 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
730 {
731 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
732 struct iwl_mvm_tid_data *tid_data;
733 int txq_id;
734
735 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
736 return -EINVAL;
737
738 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
739 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
740 mvmsta->tid_data[tid].state);
741 return -ENXIO;
742 }
743
744 lockdep_assert_held(&mvm->mutex);
745
746 for (txq_id = IWL_MVM_FIRST_AGG_QUEUE;
747 txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++)
748 if (mvm->queue_to_mac80211[txq_id] ==
749 IWL_INVALID_MAC80211_QUEUE)
750 break;
751
752 if (txq_id > IWL_MVM_LAST_AGG_QUEUE) {
753 IWL_ERR(mvm, "Failed to allocate agg queue\n");
754 return -EIO;
755 }
756
757 /* the new tx queue is still connected to the same mac80211 queue */
758 mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_ac[tid]];
759
760 spin_lock_bh(&mvmsta->lock);
761 tid_data = &mvmsta->tid_data[tid];
762 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
763 tid_data->txq_id = txq_id;
764 *ssn = tid_data->ssn;
765
766 IWL_DEBUG_TX_QUEUES(mvm,
767 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
768 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
769 tid_data->next_reclaimed);
770
771 if (tid_data->ssn == tid_data->next_reclaimed) {
772 tid_data->state = IWL_AGG_STARTING;
773 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
774 } else {
775 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
776 }
777
778 spin_unlock_bh(&mvmsta->lock);
779
780 return 0;
781 }
782
783 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
784 struct ieee80211_sta *sta, u16 tid, u8 buf_size)
785 {
786 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
787 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
788 int queue, fifo, ret;
789 u16 ssn;
790
791 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
792
793 spin_lock_bh(&mvmsta->lock);
794 ssn = tid_data->ssn;
795 queue = tid_data->txq_id;
796 tid_data->state = IWL_AGG_ON;
797 tid_data->ssn = 0xffff;
798 spin_unlock_bh(&mvmsta->lock);
799
800 fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]];
801
802 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
803 if (ret)
804 return -EIO;
805
806 iwl_trans_txq_enable(mvm->trans, queue, fifo, mvmsta->sta_id, tid,
807 buf_size, ssn);
808
809 /*
810 * Even though in theory the peer could have different
811 * aggregation reorder buffer sizes for different sessions,
812 * our ucode doesn't allow for that and has a global limit
813 * for each station. Therefore, use the minimum of all the
814 * aggregation sessions and our default value.
815 */
816 mvmsta->max_agg_bufsize =
817 min(mvmsta->max_agg_bufsize, buf_size);
818 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
819
820 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
821 sta->addr, tid);
822
823 if (mvm->cfg->ht_params->use_rts_for_aggregation) {
824 /*
825 * switch to RTS/CTS if it is the prefer protection
826 * method for HT traffic
827 * this function also sends the LQ command
828 */
829 return iwl_mvm_tx_protection(mvm, &mvmsta->lq_sta.lq,
830 mvmsta, true);
831 /*
832 * TODO: remove the TLC_RTS flag when we tear down the last
833 * AGG session (agg_tids_count in DVM)
834 */
835 }
836
837 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, CMD_ASYNC, false);
838 }
839
840 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
841 struct ieee80211_sta *sta, u16 tid)
842 {
843 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
844 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
845 u16 txq_id;
846 int err;
847
848
849 /*
850 * If mac80211 is cleaning its state, then say that we finished since
851 * our state has been cleared anyway.
852 */
853 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
854 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
855 return 0;
856 }
857
858 spin_lock_bh(&mvmsta->lock);
859
860 txq_id = tid_data->txq_id;
861
862 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
863 mvmsta->sta_id, tid, txq_id, tid_data->state);
864
865 switch (tid_data->state) {
866 case IWL_AGG_ON:
867 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
868
869 IWL_DEBUG_TX_QUEUES(mvm,
870 "ssn = %d, next_recl = %d\n",
871 tid_data->ssn, tid_data->next_reclaimed);
872
873 /* There are still packets for this RA / TID in the HW */
874 if (tid_data->ssn != tid_data->next_reclaimed) {
875 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
876 err = 0;
877 break;
878 }
879
880 tid_data->ssn = 0xffff;
881 iwl_trans_txq_disable(mvm->trans, txq_id);
882 /* fall through */
883 case IWL_AGG_STARTING:
884 case IWL_EMPTYING_HW_QUEUE_ADDBA:
885 /*
886 * The agg session has been stopped before it was set up. This
887 * can happen when the AddBA timer times out for example.
888 */
889
890 /* No barriers since we are under mutex */
891 lockdep_assert_held(&mvm->mutex);
892 mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE;
893
894 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
895 tid_data->state = IWL_AGG_OFF;
896 err = 0;
897 break;
898 default:
899 IWL_ERR(mvm,
900 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
901 mvmsta->sta_id, tid, tid_data->state);
902 IWL_ERR(mvm,
903 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
904 err = -EINVAL;
905 }
906
907 spin_unlock_bh(&mvmsta->lock);
908
909 return err;
910 }
911
912 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
913 struct ieee80211_sta *sta, u16 tid)
914 {
915 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
916 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
917 u16 txq_id;
918 enum iwl_mvm_agg_state old_state;
919
920 /*
921 * First set the agg state to OFF to avoid calling
922 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
923 */
924 spin_lock_bh(&mvmsta->lock);
925 txq_id = tid_data->txq_id;
926 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
927 mvmsta->sta_id, tid, txq_id, tid_data->state);
928 old_state = tid_data->state;
929 tid_data->state = IWL_AGG_OFF;
930 spin_unlock_bh(&mvmsta->lock);
931
932 if (old_state >= IWL_AGG_ON) {
933 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
934 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
935
936 iwl_trans_txq_disable(mvm->trans, tid_data->txq_id);
937 }
938
939 mvm->queue_to_mac80211[tid_data->txq_id] =
940 IWL_INVALID_MAC80211_QUEUE;
941
942 return 0;
943 }
944
945 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
946 {
947 int i;
948
949 lockdep_assert_held(&mvm->mutex);
950
951 i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM);
952
953 if (i == STA_KEY_MAX_NUM)
954 return STA_KEY_IDX_INVALID;
955
956 __set_bit(i, mvm->fw_key_table);
957
958 return i;
959 }
960
961 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
962 struct ieee80211_sta *sta)
963 {
964 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
965
966 if (sta) {
967 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
968
969 return mvm_sta->sta_id;
970 }
971
972 /*
973 * The device expects GTKs for station interfaces to be
974 * installed as GTKs for the AP station. If we have no
975 * station ID, then use AP's station ID.
976 */
977 if (vif->type == NL80211_IFTYPE_STATION &&
978 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
979 return mvmvif->ap_sta_id;
980
981 return IWL_MVM_STATION_COUNT;
982 }
983
984 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
985 struct iwl_mvm_sta *mvm_sta,
986 struct ieee80211_key_conf *keyconf,
987 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
988 u32 cmd_flags)
989 {
990 __le16 key_flags;
991 struct iwl_mvm_add_sta_cmd cmd = {};
992 int ret, status;
993 u16 keyidx;
994 int i;
995
996 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
997 STA_KEY_FLG_KEYID_MSK;
998 key_flags = cpu_to_le16(keyidx);
999 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1000
1001 switch (keyconf->cipher) {
1002 case WLAN_CIPHER_SUITE_TKIP:
1003 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1004 cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1005 for (i = 0; i < 5; i++)
1006 cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1007 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
1008 break;
1009 case WLAN_CIPHER_SUITE_CCMP:
1010 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1011 memcpy(cmd.key.key, keyconf->key, keyconf->keylen);
1012 break;
1013 default:
1014 WARN_ON(1);
1015 return -EINVAL;
1016 }
1017
1018 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1019 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1020
1021 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1022 cmd.key.key_offset = keyconf->hw_key_idx;
1023 cmd.key.key_flags = key_flags;
1024 cmd.add_modify = STA_MODE_MODIFY;
1025 cmd.modify_mask = STA_MODIFY_KEY;
1026 cmd.sta_id = sta_id;
1027
1028 status = ADD_STA_SUCCESS;
1029 if (cmd_flags == CMD_SYNC)
1030 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1031 &cmd, &status);
1032 else
1033 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1034 sizeof(cmd), &cmd);
1035
1036 switch (status) {
1037 case ADD_STA_SUCCESS:
1038 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1039 break;
1040 default:
1041 ret = -EIO;
1042 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1043 break;
1044 }
1045
1046 return ret;
1047 }
1048
1049 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1050 struct ieee80211_key_conf *keyconf,
1051 u8 sta_id, bool remove_key)
1052 {
1053 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1054
1055 /* verify the key details match the required command's expectations */
1056 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1057 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1058 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1059 return -EINVAL;
1060
1061 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1062 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1063
1064 if (remove_key) {
1065 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1066 } else {
1067 struct ieee80211_key_seq seq;
1068 const u8 *pn;
1069
1070 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1071 ieee80211_aes_cmac_calculate_k1_k2(keyconf,
1072 igtk_cmd.K1, igtk_cmd.K2);
1073 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1074 pn = seq.aes_cmac.pn;
1075 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1076 ((u64) pn[4] << 8) |
1077 ((u64) pn[3] << 16) |
1078 ((u64) pn[2] << 24) |
1079 ((u64) pn[1] << 32) |
1080 ((u64) pn[0] << 40));
1081 }
1082
1083 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1084 remove_key ? "removing" : "installing",
1085 igtk_cmd.sta_id);
1086
1087 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, CMD_SYNC,
1088 sizeof(igtk_cmd), &igtk_cmd);
1089 }
1090
1091
1092 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1093 struct ieee80211_vif *vif,
1094 struct ieee80211_sta *sta)
1095 {
1096 struct iwl_mvm_vif *mvmvif = (void *)vif->drv_priv;
1097
1098 if (sta)
1099 return sta->addr;
1100
1101 if (vif->type == NL80211_IFTYPE_STATION &&
1102 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1103 u8 sta_id = mvmvif->ap_sta_id;
1104 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1105 lockdep_is_held(&mvm->mutex));
1106 return sta->addr;
1107 }
1108
1109
1110 return NULL;
1111 }
1112
1113 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1114 struct ieee80211_vif *vif,
1115 struct ieee80211_sta *sta,
1116 struct ieee80211_key_conf *keyconf,
1117 bool have_key_offset)
1118 {
1119 struct iwl_mvm_sta *mvm_sta;
1120 int ret;
1121 u8 *addr, sta_id;
1122 struct ieee80211_key_seq seq;
1123 u16 p1k[5];
1124
1125 lockdep_assert_held(&mvm->mutex);
1126
1127 /* Get the station id from the mvm local station table */
1128 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1129 if (sta_id == IWL_MVM_STATION_COUNT) {
1130 IWL_ERR(mvm, "Failed to find station id\n");
1131 return -EINVAL;
1132 }
1133
1134 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1135 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1136 goto end;
1137 }
1138
1139 /*
1140 * It is possible that the 'sta' parameter is NULL, and thus
1141 * there is a need to retrieve the sta from the local station table.
1142 */
1143 if (!sta) {
1144 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1145 lockdep_is_held(&mvm->mutex));
1146 if (IS_ERR_OR_NULL(sta)) {
1147 IWL_ERR(mvm, "Invalid station id\n");
1148 return -EINVAL;
1149 }
1150 }
1151
1152 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1153 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1154 return -EINVAL;
1155
1156 if (!have_key_offset) {
1157 /*
1158 * The D3 firmware hardcodes the PTK offset to 0, so we have to
1159 * configure it there. As a result, this workaround exists to
1160 * let the caller set the key offset (hw_key_idx), see d3.c.
1161 */
1162 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1163 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1164 return -ENOSPC;
1165 }
1166
1167 switch (keyconf->cipher) {
1168 case WLAN_CIPHER_SUITE_TKIP:
1169 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1170 /* get phase 1 key from mac80211 */
1171 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1172 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1173 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1174 seq.tkip.iv32, p1k, CMD_SYNC);
1175 break;
1176 case WLAN_CIPHER_SUITE_CCMP:
1177 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1178 0, NULL, CMD_SYNC);
1179 break;
1180 default:
1181 IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher);
1182 ret = -EINVAL;
1183 }
1184
1185 if (ret)
1186 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1187
1188 end:
1189 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1190 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1191 sta->addr, ret);
1192 return ret;
1193 }
1194
1195 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1196 struct ieee80211_vif *vif,
1197 struct ieee80211_sta *sta,
1198 struct ieee80211_key_conf *keyconf)
1199 {
1200 struct iwl_mvm_sta *mvm_sta;
1201 struct iwl_mvm_add_sta_cmd cmd = {};
1202 __le16 key_flags;
1203 int ret, status;
1204 u8 sta_id;
1205
1206 lockdep_assert_held(&mvm->mutex);
1207
1208 /* Get the station id from the mvm local station table */
1209 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1210
1211 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1212 keyconf->keyidx, sta_id);
1213
1214 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1215 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1216
1217 ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1218 if (!ret) {
1219 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1220 keyconf->hw_key_idx);
1221 return -ENOENT;
1222 }
1223
1224 if (sta_id == IWL_MVM_STATION_COUNT) {
1225 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1226 return 0;
1227 }
1228
1229 /*
1230 * It is possible that the 'sta' parameter is NULL, and thus
1231 * there is a need to retrieve the sta from the local station table,
1232 * for example when a GTK is removed (where the sta_id will then be
1233 * the AP ID, and no station was passed by mac80211.)
1234 */
1235 if (!sta) {
1236 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1237 lockdep_is_held(&mvm->mutex));
1238 if (!sta) {
1239 IWL_ERR(mvm, "Invalid station id\n");
1240 return -EINVAL;
1241 }
1242 }
1243
1244 mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv;
1245 if (WARN_ON_ONCE(mvm_sta->vif != vif))
1246 return -EINVAL;
1247
1248 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1249 STA_KEY_FLG_KEYID_MSK);
1250 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1251 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1252
1253 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1254 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1255
1256 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1257 cmd.key.key_flags = key_flags;
1258 cmd.key.key_offset = keyconf->hw_key_idx;
1259 cmd.sta_id = sta_id;
1260
1261 cmd.modify_mask = STA_MODIFY_KEY;
1262 cmd.add_modify = STA_MODE_MODIFY;
1263
1264 status = ADD_STA_SUCCESS;
1265 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
1266 &cmd, &status);
1267
1268 switch (status) {
1269 case ADD_STA_SUCCESS:
1270 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1271 break;
1272 default:
1273 ret = -EIO;
1274 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1275 break;
1276 }
1277
1278 return ret;
1279 }
1280
1281 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1282 struct ieee80211_vif *vif,
1283 struct ieee80211_key_conf *keyconf,
1284 struct ieee80211_sta *sta, u32 iv32,
1285 u16 *phase1key)
1286 {
1287 struct iwl_mvm_sta *mvm_sta;
1288 u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1289
1290 if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1291 return;
1292
1293 rcu_read_lock();
1294
1295 if (!sta) {
1296 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1297 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1298 rcu_read_unlock();
1299 return;
1300 }
1301 }
1302
1303 mvm_sta = (void *)sta->drv_priv;
1304 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id,
1305 iv32, phase1key, CMD_ASYNC);
1306 rcu_read_unlock();
1307 }
1308
1309 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1310 struct ieee80211_sta *sta)
1311 {
1312 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1313 struct iwl_mvm_add_sta_cmd cmd = {
1314 .add_modify = STA_MODE_MODIFY,
1315 .sta_id = mvmsta->sta_id,
1316 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1317 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1318 };
1319 int ret;
1320
1321 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1322 if (ret)
1323 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1324 }
1325
1326 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1327 struct ieee80211_sta *sta,
1328 enum ieee80211_frame_release_type reason,
1329 u16 cnt)
1330 {
1331 u16 sleep_state_flags =
1332 (reason == IEEE80211_FRAME_RELEASE_UAPSD) ?
1333 STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL;
1334 struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;
1335 struct iwl_mvm_add_sta_cmd cmd = {
1336 .add_modify = STA_MODE_MODIFY,
1337 .sta_id = mvmsta->sta_id,
1338 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1339 .sleep_tx_count = cpu_to_le16(cnt),
1340 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1341 /*
1342 * Same modify mask for sleep_tx_count and sleep_state_flags so
1343 * we must set the sleep_state_flags too.
1344 */
1345 .sleep_state_flags = cpu_to_le16(sleep_state_flags),
1346 };
1347 int ret;
1348
1349 /* TODO: somehow the fw doesn't seem to take PS_POLL into account */
1350 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1351 if (ret)
1352 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1353 }
Linux kernel - Deliverables
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